How can I fix my Bosch Maxx WFL2260 washing machine?

My Bosch Maxx WFL 2260 washing machine had water in it at end of cycle. When I put it onto drain cycle the drum didn't turn or clear the water. I have checked that there is nothing blocking the impeller but the machine still doesn't drain and seems to make a stuttering sound when set onto rinse. Is this likely to be something I can fix or do I need to call an engineer? I changed the brushes on the machine only about 6 weeks ago.